Question about Stepdeck with air controls

Top right should be normal/highway while driving, that big lever looks like a possible over inflate or ride height adjustment valve. Raise/lower on top right position opens the valve so then you can adjust it with that lever.

 

... Probably to slide axle

 

To the left is normal operation. Leave it there 99.9% of the time. To the right you can use the lever and pressure gauge to raise or lower pressure/deck height. I've no actual experience with that setup but with the limited information I'd guess I'm right

 

Flip the top valve to raise/lower.
Pull the lever to overinflate to get up to dock height if loading from one.

Or exhaust/dump all air to get a better loading angle when using a ramp kit.

Or dump while driving a heavy machine off the tail so you don't tear up the rubber dock bumpers on the tail.. ask me how I know that one?

Leave the big lever in the position that dumped the bags. Turn valve to normal/highway for all driving.

Only overinflate while moving really slow if you get hung up on the ground..

It is not a manual ride height control..

 

Think of the right switch as an on off switch of the manual control valve. Highway is off and normal. Raise lower is on and you can raise and lower the suspension with the manual valve. The manual valve probably does nothing with the other valve in normal.

 

That is correct, at least on my doonan..